Lightening dark underarms entails paying a little more attention to that area — beyond just swiping ... resistance — a condition known as acanthosis nigricans,” says Dr. Viktoryia ...

One of them is called acanthosis nigricans, which presents as darkened ... elbows, knees, and groin area. They may be ...

One of them is called acanthosis nigricans, which is darkened skin patches. These discolourations, which give the appearance of dirty skin, appear on the neck, elbows, knees, and groin area.